| Commit message (Collapse) | Author | Age | Files | Lines |
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'sched/urgent' into sched/core
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Right now, there is no notifier that is called on a new cpu, before the new
cpu begins processing interrupts/softirqs.
Various kernel function would need that notification, e.g. kvm works around
by calling smp_call_function_single(), rcu polls cpu_online_map.
The patch adds a CPU_STARTING notification. It also adds a helper function
that sends the message to all cpu_chain handlers.
Tested on x86-64.
All other archs are untested. Especially on sparc, I'm not sure if I got
it right.
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb:
kgdb: call touch_softlockup_watchdog on resume
kgdb, x86: Avoid invoking kgdb_nmicallback twice per NMI
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Stress-testing KVM's latest NMI support with kgdbts inside an SMP guest,
I came across spurious unhandled NMIs while running the singlestep test.
Looking closer at the code path each NMI takes when KGDB is enabled, I
noticed that kgdb_nmicallback is called twice per event: One time via
DIE_NMI_IPI notification, the second time on DIE_NMI. Removing the first
invocation cures the unhandled NMIs here.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: gart iommu have direct mapping when agp is present too
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move init_memory_mapping() out of init_k8_gatt.
for: http://bugzilla.kernel.org/show_bug.cgi?id=11676
2.6.27-rc2 to rc8, apgart fails, iommu=soft works, regression
This is needed because we need to map the GART aperture even
if the GATT is not initialized.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6:
ide: workaround for bogus gcc warning in ide_sysfs_register_port()
ide-cd: Optiarc DVD RW AD-7200A does play audio
IDE: Fix platform device registration in Swarm IDE driver (v2)
ide-dma: fix ide_build_dmatable() for TRM290
ide-cd: temporary tray close fix
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The Swarm IDE driver uses a release method which is defined in the driver
itself thus potentially oopsable. The simple fix would be to just leak
the device but this patch goes the full length and moves the entire
handling of the platform device in the platform code and retains only
the platform driver code in drivers/ide/mips/swarm.c.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: "Maciej W. Rozycki" <macro@linux-mips.org>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
[bart: remove no longer needed BLK_DEV_IDE_SWARM from ide/Kconfig]
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
[MIPS] IP27: Fix build errors if CONFIG_MAPPED_KERNEL=y
[MIPS] Fix CMP Kconfig configuration and mark as broken.
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Because sync-r4k.c doesn't build.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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There is a bug in the BIOSes of some HP boxes with AMD Turions which
connects IO-APIC pins with ACPI thermal trip points in such a way that
if the state of the IO-APIC is not as expected by the (buggy) BIOS, the
thermal trip points are set to insanely low values (usually all of them
become 16 degrees Celsius). As a result, thermal throttling kicks in
and knock the system down to its shoes.
Unfortunately some of the recent IO-APIC changes made the bug show up.
To prevent this from happening, blacklist machines that are known to be
affected (nx6115 and 6715b in this particular case).
This fixes http://bugzilla.kernel.org/show_bug.cgi?id=11516 listed as
a regression from 2.6.26.
On my box it was caused by:
commit 691874fa96d6349a8b60f8ea9c2bae52ece79941
Author: Maciej W. Rozycki <macro@linux-mips.org>
Date: Tue May 27 21:19:51 2008 +0100
x86: I/O APIC: timer through 8259A second-chance
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
and the whole story is described in this (huge) thread:
http://marc.info/?l=linux-kernel&m=121358440508410&w=4
Matthew Garrett told us about that happening on the nx6125:
http://marc.info/?l=linux-kernel&m=121396307411930&w=4
and then Maciej analysed the breakage on the basis of a DSDT from the
nx6325:
http://marc.info/?l=linux-kernel&m=121401068718826&w=4
As far as the Dmitry's and Jason's boxes are concerned, I recognized the
symptoms and asked them to verify that the blacklisting helped.
It appears that the buggy BIOS code has been copy-pasted to the entire
range of machines, for no good reason.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Tested-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Tested-by: Jason Vas Dias <jason.vas.dias@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86 setup: correct segfault in generation of 32-bit reloc kernel
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Impact: segfault on build of a 32-bit relocatable kernel
When converting arch/x86/boot/compressed/relocs.c to support unlimited
sections, the computation of sym_strtab in walk_relocs() was done
incorrectly. This causes a segfault for some people when building the
relocatable 32-bit kernel.
Pointed out by Anonymous <pageexec@freemail.hu>.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
[MIPS] SMTC: Fix SMTC dyntick support.
[MIPS] SMTC: Close tiny holes in the SMTC IPI replay system.
[MIPS] SMTC: Fix holes in SMTC and FPU affinity support.
[MIPS] SMTC: Build fix: Fix filename in Makefile
[MIPS] Build fix: Fix irq flags type
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Rework of SMTC support to make it work with the new clock event system,
allowing "tickless" operation, and to make it compatible with the use of
the "wait_irqoff" idle loop. The new clocking scheme means that the
previously optional IPI instant replay mechanism is now required, and has
been made more robust.
Signed-off-by: Kevin D. Kissell <kevink@paralogos.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Kevin D. Kissell <kevink@paralogos.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Kevin D. Kissell <kevink@paralogos.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Though from a hardware perspective it would be sensible to use only a
32-bit unsigned int type Linux defines interrupt flags to be stored in
an unsigned long and nothing else.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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This fixes a regression that came with 934b2857cc576ae53c92a66e63fce7ddcfa74691
("[S390] nohz/sclp: disable timer on synchronous waits.").
If udelay() gets called from a disabled context it sets the clock comparator
to a value where it expects the next interrupt. When the interrupt happens
the clock comparator gets not reset and therefore the interrupt condition
doesn't get cleared. The result is an endless timer interrupt loop.
In addition this patch fixes also the following:
rcutorture reveals that our __udelay implementation is still buggy,
since it might schedule tasklets, but prevents their execution:
NOHZ: local_softirq_pending 42
NOHZ: local_softirq_pending 02
NOHZ: local_softirq_pending 142
NOHZ: local_softirq_pending 02
To fix this we make sure that only the clock comparator interrupt
is enabled when the enabled wait psw is loaded.
Also no code gets called anymore which might schedule tasklets.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Commit 00c5372d37a78990c1530184a9c792ee60a30067 caused the MPC8544DS
board to hang at boot. The MPC8544DS is unique in that it doesn't use
the PCI slots on the ULI (unlike the MPC8572DS or MPC8610HPCD). So
the dummy read at the end of the address space causes us to hang.
We can detect the situation by comparing the bridge's BARs versus
the root complex.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, vmi: fix broken LDT access
x86: fix typo in enable_mtrr_cleanup early parameter
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This one took a long time to rear up because LDT usage is not very
common, but the bug is quite serious. It got introduced along with
another bug, already fixed, by 75b8bb3e56ca09a467fbbe5229bc68627f7445be
After investigating a JRE failure, I found this bug was introduced a long time
ago, and had already managed to survive another bugfix which occurred on the
same line. The result is a total failure of the JRE due to LDT selectors not
working properly.
Signed-off-by: Zachary Amsden <zach@vmware.com>
Cc: Glauber de Oliveira Costa <gcosta@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Correct typo for 'enable_mtrr_cleanup' early boot param name.
Signed-off-by: J.A. Magallon <jamagallon@ono.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Fix the IRQ handling on the MN10300 arch.
This patch makes a number of significant changes:
(1) It separates the irq_chip definition for edge-triggered interrupts from
the one for level-triggered interrupts.
This is necessary because the MN10300 PIC latches the IRQ channel's
interrupt request bit (GxICR_REQUEST), even after the device has ceased to
assert its interrupt line and the interrupt channel has been disabled in
the PIC. So for level-triggered interrupts we need to clear this bit when
we re-enable - which is achieved by setting GxICR_DETECT but not
GxICR_REQUEST when writing to the register.
Not doing this results in spurious interrupts occurring because calling
mask_ack() at the start of handle_level_irq() is insufficient - it fails
to clear the REQUEST latch because the device that caused the interrupt is
still asserting its interrupt line at this point.
(2) IRQ disablement [irq_chip::disable_irq()] shouldn't clear the interrupt
request flag for edge-triggered interrupts lest it lose an interrupt.
(3) IRQ unmasking [irq_chip::unmask_irq()] also shouldn't clear the interrupt
request flag for edge-triggered interrupts lest it lose an interrupt.
(4) The end() operation is now left to the default (no-operation) as
__do_IRQ() is compiled out. This may affect misrouted_irq(), but
according to Thomas Gleixner it's the correct thing to do.
(5) handle_level_irq() is used for edge-triggered interrupts rather than
handle_edge_irq() as the MN10300 PIC latches interrupt events even on
masked IRQ channels, thus rendering IRQ_PENDING unnecessary. It is
sufficient to call mask_ack() at the start and unmask() at the end.
(6) For level-triggered interrupts, ack() is now NULL as it's not used, and
there is no effective ACK function on the PIC. mask_ack() is now the
same as mask() as the latch continues to latch, even when the channel is
masked.
Further, the patch discards the disable() op implementation as its now the same
as the mask() op implementation, which is used instead.
It also discards the enable() op implementations as they're now the same as
the unmask() op implementations, which are used instead.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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After investigating a JRE failure, I found this bug was introduced a
long time ago, and had already managed to survive another bugfix which
occurred on the same line. The result is a total failure of the JRE due
to LDT selectors not working properly.
This one took a long time to rear up because LDT usage is not very
common, but the bug is quite serious. It got introduced along with
another bug, already fixed, by 75b8bb3e56ca09a467fbbe5229bc68627f7445be
Signed-off-by: Zachary Amsden <zach@vmware.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Glauber de Oliveira Costa <gcosta@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
[IA64] Put the space for cpu0 per-cpu area into .data section
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Initial fix for making sure that we can access percpu variables
in all C code (commit: 10617bbe84628eb18ab5f723d3ba35005adde143)
inadvertantly allocated the memory in the "percpu" section of
the vmlinux ELF executable. This confused kexec/dump.
Signed-off-by: Tony Luck <tony.luck@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc: Fix failure to shutdown with CPU hotplug
powerpc: Fix PCI in Holly device tree
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I tracked down the shutdown regression to CPUs not dying
when being shut down during power-off. This turns out to
be due to the system_state being SYSTEM_POWER_OFF, which
this code doesn't take as a valid state for shutting off
CPUs in.
This has never made sense to me, but when I added hotplug
code to implement hibernate I only "made it work" and did
not question the need to check the system_state. Thomas
Gleixner helped me dig, but the only thing we found is
that it was added with the original commit that added CPU
hotplug support.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Joel Schopp <jschopp@austin.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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The PCI bridge on the Holly board is incorrectly represented in the
device tree. The current device tree node for the PCI bridge sits
under the tsi-bridge node. That's not obviously wrong, but the PCI
bridge translates some PCI spaces into CPU address ranges which were
not translated by the "ranges" property in tsi-bridge node.
We used to get away with this problem because the PCI bridge discovery
code was also buggy, assuming incorrectly that PCI host bridge nodes
were always directly under the root bus and treating the translated
addresses as raw CPU addresses, rather than parent bus addresses.
This has since been fixed, thus breaking Holly.
This could be fixed by adding extra translations to the tsi-bridge
node, but this patch instead moves the Holly PCI bridge out of the
tsi-bridge node to the root bus. This makes the tsi-bridge node
represent only the built-in IO devices in the bridge, with a
more-or-less contiguous address range. This is the same convention
used on Freescale SoC chips, where the "soc" node represents only the
IMMR region, and the PCI and other bus bridges are separate nodes
under the root bus.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: disable apm on the olpc
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The OLPC doesn't support APM but also doesn't have DMI, so we can't detect
and disable it based on DMI data. So, just disable based on machine_is_olpc()
Signed-off-by: Jeremy Katz <katzj@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
[SSB] Initialise dma_mask for SSB_BUSTYPE_SSB devices
[MIPS] BCM47xx: Fix build error due to missing PCI functions
[MIPS] IP27: Switch to dynamic interrupt routing avoding panic on error.
[MIPS] au1000: Make sure GPIO value is zero or one
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This patch defines pcibios_map_irq() and pcibios_plat_dev_init() for
the BCM47xx platform.
It fixes the regression introduced by commit
aab547ce0d1493d400b6468c521a0137cd8c1edf.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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pcibios_map_irq is no way of returning an error but on IP27 an interrupt
is possibly not routable when running out of resources. So do the
interrupt routing at pcibios_enable_device time.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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David Brownell <david-b@pacbell.net> wrote:
> The problem is that "value" is zero-or-nonzero.
> This code wrongly assumes it's zero-or-one.
> Possible fix: "((!!value) << gpio)".
Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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* 'linux-m32r' of git://www.linux-m32r.org/git/takata/linux-2.6_dev:
m32r/kernel/: cleanups
m32r: export __ndelay
m32r: export empty_zero_page
m32r: don't offer CONFIG_ISA
m32r: remove the unused NOHIGHMEM option
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This patch contains the following cleanups:
- make the following needlessly global code static:
- entry.S: resume_userspace
- process.c: pm_idle
- process.c: default_idle()
- smp.c: send_IPI_allbutself()
- time.c: timer_interrupt()
- time.c: struct irq0
- traps.c: set_eit_vector_entries()
- traps.c: kstack_depth_to_print
- traps.c: show_trace()
- traps.c: die_lock
- remove the following unused code:
- head.S: startup_32
- process.c: hlt_counter
- process.c: disable_hlt()
- process.c: enable_hlt()
- process.c: dump_task_regs()
- remove the following variables and their usages since they were
always 0:
- irq.c: irq_err_count
- irq.c: irq_mis_count
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
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ERROR: "__ndelay" [drivers/spi/spi_bitbang.ko] undefined!
Reported-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
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ERROR: "empty_zero_page" [fs/ext4/ext4dev.ko] undefined!
Reported-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
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As far as I know no M32R hardware actually has ISA slots.
And ISA drivers don't compile on M32R.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
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Remove the unused NOHIGHMEM option.
Reviewed-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb:
kgdboc,tty: Fix tty polling search to use name correctly
kgdb, x86_64: fix PS CS SS registers in gdb serial
kgdb, x86_64: gdb serial has BX and DX reversed
kgdb, x86, arm, mips, powerpc: ignore user space single stepping
kgdb: could not write to the last of valid memory with kgdb
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On x86_64 the gdb serial register structure defines the PS (also known
as eflags), CS and SS registers as 4 bytes entities.
This patch splits the x86_64 regnames enum into a 32 and 64 version to
account for the 32 bit entities in the gdb serial packets.
Also the program counter is properly filled in for the sleeping
threads.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
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On the x86 arch, user space single step exceptions should be ignored
if they occur in the kernel space, such as ptrace stepping through a
system call.
First check if it is kgdb that is executing a single step, then ensure
it is not an accidental traversal into the user space, while in kgdb,
any other time the TIF_SINGLESTEP is set, kgdb should ignore the
exception.
On x86, arm, mips and powerpc, the kgdb_contthread usage was
inconsistent with the way single stepping is implemented in the kgdb
core. The arch specific stub should always set the
kgdb_cpu_doing_single_step correctly if it is single stepping. This
allows kgdb to correctly process an instruction steps if ptrace
happens to be requesting an instruction step over a system call.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
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Delete ARM's own cnt32_to_63.h as the copy in include/linux/ should now be
used instead.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: prevent stale state of c1e_mask across CPU offline/online, fix
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Fix build error introduced by commit 4faac97d44ac27 ("x86: prevent stale
state of c1e_mask across CPU offline/online").
process_32.c needs to include idle.h to get the prototype for
c1e_remove_cpu()
Signed-off-by: Marc Dionne <marc.c.dionne@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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